by Ann » Tue Jan 04, 2011 7:38 pm
Bruce Pipes, thank you very much for your beautifully resolved and detailed portrait of the NGC 206 region in Andromeda and some of its globular clusters. I so appreciate that you went to the trouble of labelling the globular clusters, too. It is fascinating that they look so faint. Well, I guess that the individual bright points that we see apparently in Andromeda are either individual supergiants, tight bright young clusters or foreground Milky Way stars, and in view of that it is not so surprising that the globulars look comparatively faint.
Me being such a color freak, I would like to ask you about the color of some of the globulars. Most of them display exactly the type of color that I expect from globular clusters, either perfectly neutral like RBC0331 or ever so slightly yellowish like RBC0005, G40 or G71. However, there are three globulars that look surprisingly blue to me, RBC0959 and G48 and G49. The two latter ones actually look pretty much exactly like one of the bright blue supergiants in NGC 206! Have you heard of any sort of explanation for the appearance of these two globulars? Could they possibly be very young as globulars go?
Ann
Bruce Pipes, thank you very much for your beautifully resolved and detailed portrait of the NGC 206 region in Andromeda and some of its globular clusters. I so appreciate that you went to the trouble of labelling the globular clusters, too. It is fascinating that they look so faint. Well, I guess that the individual bright points that we see apparently in Andromeda are either individual supergiants, tight bright young clusters or foreground Milky Way stars, and in view of that it is not so surprising that the globulars look comparatively faint.
Me being such a color freak, I would like to ask you about the color of some of the globulars. Most of them display exactly the type of color that I expect from globular clusters, either perfectly neutral like RBC0331 or ever so slightly yellowish like RBC0005, G40 or G71. However, there are three globulars that look surprisingly blue to me, RBC0959 and G48 and G49. The two latter ones actually look pretty much exactly like one of the bright blue supergiants in NGC 206! Have you heard of any sort of explanation for the appearance of these two globulars? Could they possibly be very young as globulars go?
Ann